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No. 6l6.|95. Patented Dec. 20, I898. B. G. LOUDEN & W. H. SHUTE. HANDPUMP FOB INFLATING BICYCLE TIRES.

(Applicatizm filed May 25, 1897.]

(No Model.)

IIIII l/vtt neowy V UNITED STATES PATENT OFFICE.

BARTHOLOMEVt G. LOUDEN AND WILLIAM R. SHUTE, OF VINELAND, NEYV JERSEY,ASSIGNORS OF ONE-THIRD TO FELIX JOHNSON, OF SAME PLACE.

HAND-PUMP FOR I NFLATING BICYCLE-TIRES.

SPECIFICATION forming part of Letters Patent No. 616,195, dated December20, 1898.

Application filed May 25,1897. Serial No. 638,103- (No model.)

To all whom, it may concern:

Be it known that we, BARTHOLOMEW- G. LoUDEN and WILLIAM R. SHUTE,citizens of the United States, residing at Vineland, in the county ofCumberland and State of New Jersey, have invented a new and usefulPortable Telescope Hand-P ump to Infiate Bicycle- Tires, of which thefollowingis a specification.

Our invention relates to collapsible pumps, and more especially to thatclass known as portable hand-pumps for inflating tires; and it has forits object the novel construction and arrangement of the several parts,as hereinafter more fully described and claimed and as illustrated inthe accompanying drawings, wherein- Figure 1 is a side view of ourimproved pump in a collapsed condition with all of its several partsassembled. Fig. 2 is a side view of the same with the parts distendedand with finger-grip and nipple removed. Fig. 3 is a sectional view ofthe outer cylinder. Fig. 4 is a side view of the inner cylinder. Fig. 5is a side view of the piston-rod with the stationary and reciprocatingpiston-head and retaining-cup for holding the rod removably within theouter cylinder. Fig. 6 is a detail view of the finger-grip and nippleseparated.

Referring to the drawings, the letter A designates the outside or maincylinder,which is provided at or near its lower end with internalscrew-threads F, for a purpose hereinafter stated.

B represents the inner or movable cylinder, which is provided near itslower end with external screw-threads G and also with aseries ofperforations or holes H H H a short distance above the threads to allowthe air to enter the cylinder B more freely. This cylinder B is closedat its upper or outer end, which latter is provided near its center witha screw-threaded aperture I.

E represents an externally-screw-threaded nipple, which is of sufficientsize at its inner end to engage the screw-threaded aperture I in thecylinderB and has secured midway of its length a milled collar E. Saidnipple is also provided on itsouter face with a longitudinal groove Eare preferably inclined outwardly, so as to allow the first and secondfinger of the operators hand to rest thereon, as will be understood. Thefinger-bar is provided at its center with an aperture of sufficient sizeto loosely surround the nipple below the milled collar E and has also aninwardly-projecting lug D, which is adapted to enter the groove E toprevent rotationg Before the nipple is screwed into the aperture I ofthe cylinder B a washer is placed thereon, so as to produce an air-tightjoint.

0 represents the piston-rod, which is hollow and is provided with aseries of apertures O O 0 &c., for a purpose which will be un- '65derstood by those skilled in the art. Secured to the lower end of thepiston-rod O by means of the axial screw P is a cap P, which has itslower portion P milled or serrated and its upper portion P externallyscrew-threaded and reduced to the proper size to allow the externalthreads to engage with the internal screw-threads F of the cylinder A,while the lower portion P extends beyond or stands aboix. flush with theperiphery of the cylinder R is a projecting lug extending inwardly fromthe cap beyond the perforations O to limit the downward movement of thehead J, described below. Secured to the other end of the rod 0 by meansof the hollow bolt or screw M is the piston-head K, and attached theretoand beneath the same isla washer L. Loosely sliding on and surroundingthe piston-rod 0 between its cap and end isa second piston-head J, whichis larger in diameter than the head K and which has attached to itslower side by means of screws J 2 a washer or packing J Thereciprocating head J is cup-shaped and is provided with internal 9oscrew-threads J, which engage the external screw-threads G on thecylinder 13 when the parts are assembled, the-piston-head K at the endof rod 0 being somewhat smaller than the reciprocating head J, so thatit may enter 5 and snugly fit the cylinder B.

To assemble the parts, the cap P is first at tached to the rod 0, thereciprocating head J then placed in position, and the head K attached tothe free end of the rod. The whole :00

is then placed within the outer cylinder A so that the threads P on thecap engage the threads F in this cylinder. The reciprocating cylinder Bis then passed over the head K until its external screw-thread G engagesthe internal screw-threads J of the head J. The various parts of thenipple E are then assembled and the screw-threaded lower end inserted inthe screw-threaded aperture I in the free end of the cylinder 13.

From the foregoing description it will be seen that the cylinder A,piston-rod O, and head K remain stationary during the operation ofinflating the tire, while the cylinder 3, attached to the head J, isreciprocated by means of the finger or grip bars D; or the cylinder B,with its various parts, may be held stationary, while the outer cylinderA, with its connected piston rod and head, is reciprocated. In use theinner cylinder B remains stationary usually, for it is connected withthe tire. As the outer cylinder A is drawn outward air enters around theinner cylinder and passes the washer J into the chamber formed at thelower end of the outer cylinder. As the latter is again pressed inwardthe air in this chamber is forced into the holes 0 0 0 20., down thelength of the tubular rod C, out through the tubular screw M, andthrough the nipple E into the tire. The apertures H in the innercylinder prevent the formation of an air-cushion in the chamber betweenits lower end and the washer L, as will be clear.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is-

In a hand-pump, the combination with an outer cylinder having internalthreads at its lower end, a cap engaging said threads to close this end,a tubular rod carried by the cap and extending the length of thecylinder, its remote end being open and its body near the cap beingperforated, and a lug projecting from the cap inward beyond certain ofsaid perforations, of an inner cylinder having a closed 0 uter endpierced with a threaded open' ing, a reciprocating piston head mountedloosely on the rod and closing the inner end of the inner cylinderaround said rod, a valve carried by this head and closing the outercylinder in one direction of its movement, and a nipple removablyengaging said opening in the outer end of the inner cylinder, as and forthe purpose set forth.

BARTHOLOMEW' G. LOUDEN. \VILLIAM R. SIIUTE. In presence of- THOMAS R.CAMPBELL, JOHN G. FRY.

